EXCITE: Wing Tam
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The document discusses green-blue infrastructure initiatives in Los Angeles to manage stormwater runoff. It outlines watershed planning efforts and the use of green infrastructure like rainwater harvesting, green streets, and low impact development to improve water quality, increase supply, and provide other benefits. Examples of existing and planned projects are provided, like the South LA Wetlands Park and various stormwater capture facilities, demonstrating how stormwater can be utilized as a resource.
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EXCITE: Wing Tam
- 1. LA Confidential - Prop O Wing K. Tam , P.E. Assistant Division Manager City of Los Angeles Sanitation September 26, 2013 Green-Blue Infrastructures in the City of Los Angeles “stormwater runoff as a resource”
- 2. Outline Background / Watershed Planning • Green-Blue Infrastructures • Rainwater Harvesting • Green Streets • Questions •
- 3. City of Los Angeles Integrated Resources Plan Background Sources of untapped water… • Stormwater:Stormwater: 100 MG/day (dry-weather);100 MG/day (dry-weather); > 3 BG/day (wet-weather)> 3 BG/day (wet-weather) • Wastewater:Wastewater: 300 MG/day goes to the ocean300 MG/day goes to the ocean • Groundwater:Groundwater: BG of water (contaminated)BG of water (contaminated) Watershed Planning - Water ““provides a universal view”provides a universal view”
- 4. City of Los Angeles Water Quality Compliance Master Plan for Urban Runoff Background Watershed Planning - Stormwater Our Mission ““ Protect Public Health and the Environment”Protect Public Health and the Environment” • Source control & institutional measures • Storm water capture, treatment, & reuse • Infiltration & groundwater recharge • Multi-use benefits • Community & stakeholder value • Drought tolerant landscaping • Pervious pavements & green roofs • Outreach / partnerships
- 5. Urban Runoff – IRP Approach Background Watershed Planning – Urban runoff Strategy – Institutional Measures • Public Outreach – Municipal Ordinances • Green Building Ordinance • Landscape Ordinance • Low Impact Development (LID) Ordinance – Local (on-site) Measures • Rain Barrels • Rain Gardens – Regional Measures • Public Projects • Green Street Standards Manuals for Public/Private • Green Street Standard Plans
- 7. • Solutions and Benefits • Improve water quality • Increase water supply • Reduce flooding • Save on energy use • Adapt to climate change • Enhance wildlife • Provide open space for habitat and recreation PUBLIC USE FLOOD PROTECTION WATER QUALITY HABITAT RESTORATION OPEN SPACE WATER SUPPLY CLIMATE ADAPTATION JOBS Green-Blue Infrastructures
- 8. Multi-benefits – Leveraging Resources Green – Blue Infrastructure allows for integrated funding and multiple benefits o Water Quality Compliance (Prop O) Clean-Up Funding o Street Improvements funding o Water Resources funding o Park funding o Grants Green-Blue Infrastructures
- 9. Proposition “O” • City of Los Angeles $500 million Clean Water Bond (2004) – Over 33 water quality, water conservation, habitat protection, and open space projects •Low Flow DiversionsLow Flow Diversions •BeforeBefore •South LA Wetlands ParkSouth LA Wetlands Park •Imperial HighwayImperial Highway Median GreeningMedian Greening Echo Park Lake RehabilitationEcho Park Lake Rehabilitation
- 10. Cost estimate & benefits $1 costs results in $6 to $22 of benefits expected Green-Blue Infrastructures
- 11. Economic & Job Impact $1 investment results in $2 economic activity Green-Blue Infrastructures Note: Water Use Efficiency and Jobs Report, 2011, by Economic Roundtable
- 12. Over 36,000 jobs created per billion invested Over 400,000 jobs are ocean related in Los Angeles County - $10 billion annually in wages and $20 billion in goods and services. Over 50 million tourists annually - Over 1.5 million jobs generated - Over $15 billion generated in Los Angeles last year Green-Blue Infrastructures Economic & Job Impact
- 13. • Manuals – guidance standards • Green Streets - Converting public right-of-way or parkway to open space for multi-benefit uses • Green Standards – institutionalizes, applies to public and private • LID – land developments and re-developments • Rainwater Harvesting – capture and use • Water Quality Matrix – Approved by Health Department • Stream Protection – Natural cleaning Green Initatives
- 14. • Implemented Pilot Rainwater Harvesting Program (600 barrels and “rain gardens”) • Followed by distributing up to 1,000 rain barrels to residences • City and community groups implementing “rain garden” program for the San Fernando Valley and South Los Angeles, with plans for City-wide implementation. • Rain Barrel and Rain Gardens Rainwater Harvesting Program
- 15. Table Installation Area Rain Barrel Rain Barrel w/ Overflow Infiltration Ballona Creek Watershed (600 homes) 600,000 gallons (approx. 2 acre-feet) 2,200,000 gallons (approx. 7 acre-feet) City of LA (800,000 homes) 800,000,000 gallons/ ( 2,430 acre-feet) 2,940,000,000 gallons (9,012 acre-feet) Note 2: 1 acre-foot can supply a family of 3 – 4 for one year Note 1: These numbers are based on 1 rain barrel per home. If 2 rain barrels per home, the numbers will double. Rainwater Harvesting Program Estimated Annual Volume of Captured Rainwater
- 16. •Oros Street – LA’s First Green Street Capture private and public runoff •Riverdale Avenue – Green Streets Program Demonstrate and monitor Green Streets •Elmer Avenue – Water Augmentation Study Combined distributed and regional solution •South Park – Ultra-urban Application Hope Street and Grand Ave. Green Streets
- 17. Green Streets
- 18. LIDs
- 19. •Porous Pavement – Rio del Los Angeles State Park •(aka: Taylor Yard) •Bioretention - Sam’s Club Parking Lot •Planter Boxes - Versailles Luxury Apartments •Oxford St, Los Angeles •Parkway Infiltration Swale •11th St & Hope St – Los Angeles •Cisterns - Lowe’s •Infiltration - Costco LIDs
- 20. •Westminster Dog Park Biofiltration •Imperial Highway Median Greening •Grand Ave Tree Wells •Before •After •Oros Green Street Rain Gardens •Los Angeles Zoo Green Parking Lot - Vegetated bio-swale •North Atwater Stream Restoration and Park Expansion Green-Blue Infrastructures
- 21. Garvanza Park Rainwater Capture and Use • Completed in March 2012 • Construction Cost: $3 Million • Captures rainwater from 80 acre drainage area • Diverting dry & wet weather runoff into an underground storage tank holding 1 million gallons • Captures water for infiltration and use at the park • Average volume per year ~ 50 AFY
- 22. ProjectsProjects Green InfrastructureGreen Infrastructure Example Projects – South LA Wetland Park •Before Construction •After Construction
- 23. Penmar Stormwater Capture Project • Phase I - Spring 2013 ($21 million) • Phase II – 2014 (estimated - $2.8 million) • Diverts stormwater into a 2.75 MG underground storage tank • ~100 AFY wet and dry weather runoff for use at park and golf course
- 24. Temescal Canyon Park Stormwater BMP Project • Phase 1 – Fall 2013 ($15m) • Phase 2 – 2014 (~$3.7m) • Wet weather diverted to 1.25 MG underground tank • Up to 50 AFY of dry and wet weather flows reused for irrigation
- 25. Other Runoff Management Projects Projects currently under construction include: • Glenoaks-Sunland Stormwater Capture • Woodman Ave Median Stormwater Capture • Ed P. Reyes River Greenway • Rosecrans Recreation Center Stormwater Enhancements • Temescal Canyon Park Stormwater Capture and Use Projects will be going to design or construction include: • Laurel Canyon Green Street and Stormwater Capture • Manchester Greenway • Broadway Green Street and Stormwater Capture • Avalon South Green Alley • Westchester Parkway Stormwater Capture • Vermont Green Street • Rory Shaw Wetlands
- 26. Conclusions • Great opportunity to meet water quality while augmenting water supply sources • Part of an integrated water resources solution and urban revitalization • Leveraging resources • Creating Jobs • May enable to secure other funding sources • Involvement of neighbourhoods and communities
- 27. Wing K. Tam , P.E. Assistant Division Manager City of Los Angeles Sanitation September 26, 2013September 26, 2013Additional Information: www.lacity.org or www.lastormwater.org www.facebook.com/lastormwaterprogramwww.facebook.com/lastormwaterprogram www.youtube.com/user/lastormwaterprogramwww.youtube.com/user/lastormwaterprogram www.lastormwater.org/blog/www.lastormwater.org/blog/